*{
    padding: 0;
    margin: 0;
}
html,body{
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: relative;
}

.bigbox{
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    padding-top: 60px;
}
.bigbox .pagehead{
    position: absolute;
    top:0;
    left: 0;
    right: 0;
    border-radius: 0;
}
.bigbox .pagebody{
    height: 100%;
}
.pagebody .pagenav{
    float: left;
    height: 100%;
    border-radius: 0;
}
.pagebody .pagenav:not(.el-menu--collapse){
    width: 200px;
}
.pagebody .pagecontent{
    margin-left: 200px;
    height: 100%;
    overflow: hidden;
    overflow-y: auto;
}







